But Negredo’s wife Clara explained it was a roar of affection, a terrace tribute to the old-fashioned No.9.

That love from the fans has allowed Negredo, 28, to think about turning his back on his native Spain where he played for ten years – and committing himself to City for life.

The former Rayo Vallecano, Almeria and Seville forward said: “Yes, I like the sound of staying because it means the supporters like me as a player and a man.

“It means I’m doing my job well.

“Did I think they were booing me at first? Yes – and I wasn’t the only one who thought that. A lot of people did.

“I have had a lot of family come over to watch me play games and they thought the crowd were booing me.

“They thought the crowd hated me. I had to explain it to them. But they were more surprised than upset.

“Luckily, my wife was sitting next to them and so she was able to explain it and set their minds at rest. It was my parents and my brothers – all the family.

BLOCKING THE WAY: Pellegrini advised Negredo to leave Real Madrid, with the likes of Cristiano Ronaldo in the starting XI [GETTY]

“They all came over at Christmas and they all felt like this when they heard the sound.

“But it didn’t spoil their Christmas for more than a few seconds because then my wife told them it was a good sound and they were happy.”

Negredo will be greeted with yet another “Beast” roar at Wembley today as he goes in search of his first trophy since moving to Manchester last year.

And he wants the Capital One Cup to be the first of many. Negredo is at City for the long term after a £20million move from Sevilla last summer.

He loved his decade in Spain where he crossed paths with his now-boss Manuel Pellegrini at Real Madrid – only for the Chilean to advise him to move to Seville.

Negredo was not getting a look-in at the Bernabeu because of the strikers ahead of him at the time – Cristiano Ronaldo, Karim Benzema, Ruud van Nistelrooy and Gonzalo Higuain – and he never played a league game for them.

But he took the hint from Pellegrini and never looked back. He scored more than a goal every other La Liga game for Seville, with his transfer to City a major career move – and perhaps a final destination.

He added: “We have to keep doing the right things. But I wouldn’t swap my life here for Spain now.

CELEBRATION: Negredo pays tribute to his family every time he scores [AFP]